I'll second that recommendation for anything from Michael Joly. He's pretty brilliant at what he does, and a nice guy too. He can also take any mic you have and make it better. I sent him my Gauge ECM-87, which was already a very nice mic (hey, Mike Caro likes it, so you know it works), and turned it into something much more Neumann-like, which has been perfect for me.

Mic mods don't always have the sexy brand mystique, and resale value takes a hit because of that too...but if you really want excellent sound at a modest price, it's the way to go. Michael Joly is one of the best at doing that.